Closure combination

Abstract

A closure combination ( 101 ) comprising a dispensing closure body ( 102 ) and a container neck ( 103 ). The dispensing closure body ( 102 ) and container neck ( 103 ) comprise co-operable screw threads ( 104, 105 ) that allow the dispensing closure body ( 102 ) to be screwed onto the container neck ( 103 ) into an engaged condition. The co-operable screw threads ( 104, 105 ) prevent the dispensing closure body ( 102 ) from being unscrewed from the container neck ( 103 ) after the dispensing closure body ( 102 ) has been screwed onto the container neck ( 103 ) into a locked condition. A dispensing closure body ( 102 ) comprising an internal screw thread ( 10 ) that comprises a reversed-thread run out portion ( 107 ). A container with a container neck ( 103 ) comprising an external screw thread ( 105 ) that comprises a reversed-thread run out portion ( 108 ). A method of providing a tamper-resistance container closure combination ( 101 ).

The invention claimed is: 
     
       1. A closure combination comprising a closure body and a container neck,
 said closure body and said container neck comprising co-operable screw threads that allow said dispensing closure body to be screwed onto said container neck into an engaged condition, 
 characterized in that 
 the closure body screw thread and the container neck screw thread comprise co-operable reversed thread run-out portions, 
 said co-operable reversed thread run-out portions defining a locking position, rotational engagement of the screw threads beyond the locking position locks the closure body onto the container neck, 
 said co-operable reversed thread run-out portions are engageable to prevent said closure body from being unscrewed from said container neck after said dispensing closure body has been screwed onto said container neck into a locked condition by acting to force the closure body back onto the neck. 
 
     
     
       2. The closure combination as claimed in  claim 1 , wherein the closure body thread comprises a lug element, the lug element being spaced from the reverse thread run-out portion to define a break region. 
     
     
       3. The closure combination as claimed in  claim 2 , wherein when said dispensing closure body has been screwed onto said container neck into said locked condition, the reversed-thread run out portion of the neck screw thread extends into the closure body break region. 
     
     
       4. The closure combination as claimed in  claim 1 , in which the screw threads comprise ridge elements. 
     
     
       5. The closure combination as claimed in  claim 1 , wherein the locked position is at approximately 340° turn of the closure body onto the neck. 
     
     
       6. The closure combination as claimed in  claim 1 , wherein the screw threads are fully engaged at approximately 360° turn of the closure body onto the neck. 
     
     
       7. The closure combination as claimed in  claim 1 , wherein said dispensing closure body comprises an internal screw thread and said container neck comprises an external screw thread. 
     
     
       8. The closure combination as claimed in  claim 1 , wherein said co-operable screw threads are one of: single start, multi-start. 
     
     
       9. The closure combination as claimed in  claim 1 , wherein said closure body forms the base of a flip-top dispensing closure. 
     
     
       10. The closure combination as claimed in  claim 9 , wherein said closure body defines one of: a single dispensing aperture, a plurality of dispensing apertures. 
     
     
       11. A closure for engaging a container neck,
 said closure comprising a screw thread that allows it to be screwed onto said container neck into an engaged condition, 
 characterized in that 
 the screw thread comprises a reversed thread run-out portion for engaging a corresponding run-out portion on said container neck, 
 said reversed thread run-out portion defining a locking position, rotational engagement of the screw thread beyond the locking position locks the closure onto the container neck in use, 
 whereby said screw thread prevents said closure from being unscrewed from said container neck after said closure has been screwed onto said container neck into a locked condition by acting to force the closure back onto the container neck. 
 
     
     
       12. A container neck,
 said container neck comprising a screw thread that allows a closure to be screwed onto it into an engaged condition, 
 characterized in that 
 the screw thread comprises a reversed thread run-out portion for engaging a corresponding run-out portion on said closure, 
 said reversed thread run-out portion defining a locking position, rotational engagement of the screw thread beyond the locking position locks the closure onto the container neck in use, 
 whereby said screw thread prevents said closure from being unscrewed from said container neck after said closure has been screwed onto said container neck into a locked condition by acting to force the closure back onto the container neck.